The Canon EF 70-200mm F/2.8L is one of the finest telephoto zoom lenses in the EF line, it’s even comparable to a single focal length lens at wide open and it’s also been said that the lens is the sharpest one among other Canon 70-200mm lenses (70-200 IS & 70-200 F/4). This lens has four UD-glass elements to correct chromatic aberrations. Its constant f/2.8 maximum aperture and superb image quality make it one of the most popular professional SLR lenses in the world.

first i just wanna to say really good photo ,
and i am a fashion photographer or trying to be one i just wanna to know, is the image sharp even at 125shutter speed,at 100 iso but i will be using a flash, will little jerk like when you r trying to click matters. will the image be sharp